JP5864052B2 - Driving machine and operation method of driving machine - Google Patents

Description

  The present invention relates to a hammer for driving a fastener into a substrate, which has an actuating piston that can be moved rapidly and straight to drive a fastener, such as a hook or nail. The invention also relates to a method for operating such a hammer.

  From US Pat. No. 6,057,056, a hammer is known which has a piston guide, which can be driven via an inflation gas and has a driving piston attached thereto in a replaceable manner. The piston return device includes a drive motor and at least one transmission device for transmitting an operating force generated in the driving piston. From US Pat. No. 6,057,049, a portable, combustion driven hammer is known which has a combustion chamber whose size can be varied by axial displacement of the front wall of the combustion chamber. From Japanese Patent Application Laid-Open No. H10-228688, a hammering machine having a driving depth control mechanism is known.

German patent No. 10325920 German Patent No. 19962695 specification EP 1277548

  The object of the present invention is to further improve the operability and / or energy efficiency during operation of the hammer.

  The purpose of this is in a nailing machine for driving a fastener into a substrate, the nailing machine having an actuating piston that can be moved straight and rapidly to drive a fastener, for example a hammer or a nail. This is achieved by providing the nailer with an operating device that allows switching between manual and automatic output adjustment modes. In the manual output adjustment mode, it is preferable that the driving energy is adjusted by the operation device by the user. In the automatic power adjustment mode, it is preferred that the driving energy is calculated and adjusted on the basis of information about the previous driving operation by a special electronic circuit under control.

  The nailer of the present invention is preferably gas driven. The gas can be introduced, for example, from a gas cartridge located in the nailer. The gas is mixed with air in the combustion chamber of the hammer. Air and gas form a rapidly expanding combustible mixture that drives the working piston. For each drive operation, a desired amount of gas is preferably metered into the combustion chamber by a metering valve based on volume or time. Particularly preferred is that the drive energy is adjusted by the amount of gas measured and / or by a selectively variable combustion chamber volume.

  Alternatively, the operating piston may be electrically driven, for example using an intermediate storage device consisting of a spring. In accordance with an essential aspect of the present invention, the user is provided with a nailer that is controlled by the user with the optimization goals of the automated system. The user or operator of the nailer can respond to the requirements for different driving operations in a simple manner. In particular, depending on the setting, it can be adjusted to have no nail protrusions or have the desired nail protrusions.

  In a preferred embodiment of the nailer, the operating device has at least one operating element, and the operation or adjustment of the operating element causes the operation of the operating piston in the automatic output adjustment mode when driving the fastener. The fastener may be modified such that the fastener protrudes from or sinks into the substrate by a specified distance. Automatic power adjustment ensures that even nail protrusions are formed even when the substrate has different hardness. The automatic system prevents unwanted overload of the nailer.

  Another preferred embodiment of the nailer is characterized in that the distance that the fastener protrudes from the substrate is continuously adjustable in the automatic power adjustment mode. The operating device may include a scale for the purpose of setting a desired nail protrusion.

  In another preferred embodiment of the nailer, the operating device has at least one operating element, the actuation or adjustment of which provides the energy supplied to the actuating piston when driving the fastener and / or the actuating piston The forward travel of the piston can be continuously adjusted in the manual output adjustment mode. The forward travel of the piston is understood to mean, for example, the distance traveled by the actuating piston before it exits the fastener guide and hits the brake and / or cushioning material. The forward travel of the piston substantially determines how deeply the fasteners, especially the nails, are driven into the substrate. If the forward piston travel is short, the working piston will slow down faster and the fasteners or nails will not be driven deeper into the substrate.

  In another preferred embodiment of the nailer, the nailer comprises a display device that displays output information in manual or automatic output adjustment mode. Using the display device, the user or operator of the nailer, for example, when the tool is controlled and in the optimal operating state, or particularly when the nailer is currently in automatic power adjustment mode. Is informed whether it is currently responding to excess or underpower.

  In the method of operating the nailer described above, the aforementioned problems are alternatively or additionally solved by switching the nailer to manual output adjustment mode or automatic output adjustment mode. This allows the user or operator of the nailer to easily handle a variety of very different types of driving. Overloading of the nailer during the desired driving operation is automatically prevented by this mechanism.

  In a preferred embodiment of the method, the operation or adjustment of the operating device in the automatic power adjustment mode is activated so that when the fastener is driven, the fastener protrudes from the substrate or sinks into the substrate at a specified distance. It is characterized by changing the movement of the piston. The distance that the fastener protrudes from the substrate is preferably adjustable continuously in the automatic power adjustment mode.

  In another preferred embodiment of the method, the piston energy supplied to the actuating piston when driving the fastener and / or the pre-piston travel of the actuating piston is determined by operation or adjustment of the operating device in manual output adjustment mode. It is characterized by being continuously adjusted. The forward travel of the piston is understood to mean, for example, the distance traveled by the actuating piston before it exits the fastener guide and hits the brake and / or cushioning material.

  Another preferred embodiment of the method is characterized in that the output information is displayed on the nailer in manual or automatic output adjustment mode. This makes it possible to issue a warning to the user or operator when the load on the tool is too large or the driving energy is too small. In the automatic output adjustment mode, information on the control state of the automatic system is shown to the user or the operator.

  In another preferred embodiment of the method, an approximation for driving the fastener based on the actuation or adjustment of the operating device and / or the evaluation of the previous driving action and / or the tool parameters and / or the ambient parameters. The target energy is determined. When calculating the target energy, it is considered during the previous driving operation whether the fasteners and / or nails have been driven with too much or too little energy (excess or under energy). Excess or under-energy can be determined by measuring the front end piston return point or by a load sensor provided in the shock absorber.

  The load history is preferably stored up to 6 drive operations. The load of the latest driving operation has the highest weight. The load that occurred earlier is less weighted as that load in determining the target energy.

  Further advantages, features and details of the present invention will become apparent from the following description. Various embodiments described will be described in detail with reference to the drawings.

Fig. 2 shows a simplified cross-sectional view of a nailer according to the invention provided with an operating device. The enlarged view of the operating device of the nailer of FIG. 1 is shown.

  In FIG. 1, a nailer 1 of the present invention having a housing 2 is depicted in a greatly simplified cross-section in the longitudinal direction. The housing 2 is provided with a handle 4, whereby the nailer 1 can be gripped for driving the fastener, and the fastener is driven out of the nozzle end 5 of the nailer 1 and driven into the substrate. obtain.

  The energy required to drive the fasteners into the substrate is stored, for example, in a gas cartridge 8 inside the nailer 1. The gas cartridge 8 can be connected to the combustion chamber 12 by means of an adjustable or controllable throttle valve 10. Within the combustion chamber 12, the gas from the gas cartridge 8 is mixed with air to form a combustible mixture and ignited to drive a fastener, such as a firewood or nail, into the substrate.

  The combustion chamber 12 is surrounded by a cylinder 14 inside the housing 2. On the rear side of the cylinder 14, the combustion chamber 12 is closed off by an adjustable combustion chamber wall 15. The combustion chamber wall 15 can be adjusted as indicated by a double arrow 18 by an electric motor 16 using an operating gear mechanism 17. By adjusting the combustion chamber wall 15 in the direction of the double arrow 18, the size of the combustion chamber can be changed in a simple manner.

  The state parameters of the combustion chamber 12 and / or the position of the adjustable combustion chamber wall 15 can be measured using the sensor device 20. The sensor device 20 is connected to the electronic control unit 25 through a sensor line 21. The electronic control unit 25 is connected to the electric motor 16 through a control line 26 in a control relationship. The electronic control unit 25 is supplied with power from the storage battery 28, for example, a battery. The electronic control unit 25 is connected to the throttle valve 10 through a further control line 29 in a control relationship.

  The combustion chamber 12 is closed off on the opposite side of the adjustable combustion chamber wall 15 by the piston bottom 32 of the working piston 34. The working piston 34 is guided in the guide bush 36 at the end opposite to the piston bottom 32. The working piston 34 extends through the cushioning material 38. The movement of the working piston 34 when driving the fastener is slowed by the cushioning material 38. The buffer material 38 further has a sensor device 40 associated therewith, which is connected to the electronic control unit 25 by a sensor line 41.

  The driving of the fastener is triggered by a trigger 42, which can be activated by the handle 4, for example with an index finger. In addition to the trigger 42, the nailer 1 of the present invention includes an operation device 44 having an operation element 45. The operating device 44 has a sensor device 50 associated therewith. The sensor device 50 is further associated with the guide bush 36. The operation device 44 is connected to the sensor device 50 through a control line 52 in a control relationship.

  In addition to the trigger 42 and the operation device 44, the hammering machine 1 of the present invention includes a display device 55 for displaying output information during operation of the hammering machine 1. The display device 55 is connected to the electronic control unit 25 and includes, for example, a display that can display information in alphanumeric characters. Alternatively or additionally, the display device 55 may comprise a color display.

  In FIG. 2, the fastener is driven into the substrate such that the fastener head completely sinks into the member to which it is secured, as shown by the fracture surface 59. In addition, the fracture surface 58 shows a fastener whose head protrudes from a member that is still fixed. The distance that the head protrudes from the substrate is also called a protrusion or a stand-off.

  In this field, different substrates and different fasteners require different driving energies. The greater the strength of the substrate, the greater the required driving energy. Furthermore, depending on the application for driving, there are various requirements for nail protrusion or standoff. When fixing a steel rail to concrete, for example, the nail protrudes against the rail. On the other hand, when fixing wood, it may be required that the head of the nail sink into the wood.

  In the operating device 44, the various setting options are depicted in FIG. 2 in the form of dashed elongated boxes 61-65. The elongated box 61 corresponds to the automatic output adjustment mode. The elongated boxes 64 and 65 correspond to the manual output adjustment mode. The elongated boxes 62 and 63 indicate that the user can switch between manual and automatic output adjustment modes.

  In FIG. 2, the operating element 45 is in a mode in which the fastener sinks into the substrate. Dashed circle 68 indicates the second position of the operating element when in automatic output adjustment mode. When the operating element 45 is placed in the second switching position 68, the fastener does not sink, as depicted at 58, but protrudes from the substrate with some protrusion.

  In the automatic power adjustment mode, the operating element 45 can be continuously adjusted between mode 59 (sinks) and mode 58 (projects). Instead of continuously variable adjustment, the operating device 44 may have two fixed settings of modes 58 and 59 in the automatic output adjustment mode.

  In manual power adjustment mode 64, 65, the minus and plus signs indicate that the user or operator of the hammer 1 can adjust the piston energy and piston forward travel separately, directly and continuously. Show. In the manual output adjustment mode, broken circles 71 to 74 indicate different switching positions.

  Each of the triangles 75 and 76 indicates that the operating element or operating element 45 can be continuously adjusted between the switching positions 71 and 72 or 73 and 74, respectively. In this arrangement, switching positions 71 and 73 correspond to a relatively low combustion energy or driving force, as indicated by a minus, and switching positions 72 and 74 are relatively large combustion energies, as indicated by a plus. Or it corresponds to the driving force.

  During the operation of the hammer 1 in particular in the automatic output adjustment mode, the determination or calculation of the required target energy approximation is related to the setting of the operating device 44, the evaluation of the previous driving operation and the additional tools. The electronic control unit 25 is used on the basis of parameters and parameters related to the surrounding environment. In calculating the target energy, special consideration is given to whether the fastener has been driven by too much or too little energy (excess or under-energy) during the previous driving operation.

  Excess or under-energy can be determined by measuring the piston return point at the front end or by a sensor device 40 provided on the cushioning material 38. It is preferable that the load history of the maximum six driving operations is stored in the electronic control unit 25. The most recent load on the cushioning material 38 has the highest weight. The load applied to the cushioning material 38 generated earlier is a lower weight when calculating the target energy.

  If the nailer's excess energy is greater than the threshold specified during operation, the target energy will decrease. If there is no excess energy reduction in the shock absorber 38, the target energy is increased by the amount Δ. The target energy is preferably selected so that the shock absorber 38 is lightly touched at the desired operating point.

  The piston energy of the working piston 34 is adjusted based on the calculated target energy. In a gas tool, the required combustion chamber volume and the required metered gas volume are determined. The capacity of the combustion chamber is adjusted by an adjustable combustion chamber wall 15. The amount of metered gas required is adjusted by the throttle valve 10.

  The metered gas volume depends on ambient conditions such as room temperature and ambient air pressure of the selected combustion chamber volume, and also tool parameters such as tool temperature, gas cartridge pressure, gas cartridge type and gas cartridge fill level , And so on. In order to inject the calculated gas amount, the electronic control unit 25 opens the throttle valve 10 that is normally closed for a predetermined time. In the process, a calculated amount of gas flows from the gas cartridge 8 to the combustion chamber 12.

  The display device 55 depicted schematically in FIG. 1 allows the user or operator of the nailer 1 to determine whether the nailer 1 is in control and in an optimal operating state during operation, or You will be informed if 1 is currently readjusting for overpower or underpower.

  In the manual power adjustment mode, the user or operator can separately adjust the pre-piston travel and piston energy. The display device 55 warns the user when excessive energy or excessive energy occurs. These warning situations are stored in the electronic control unit 25 over a relatively large number of driving operations, approximately 50-100 driving operations. For example, when a large tool load with excess energy of 30 percent or more occurs, the electronic control unit 25 switches to the safety mode, and then the excess energy is reduced to approximately 25 percent.

  The user or operator can fasten a sinking fastener, such as a nail, into the substrate as desired when securing the wood to the concrete, or secure the steel rail to the concrete. When projecting a tool, such as a nail, the nailer of the present invention can be used for both. In either case, the tool load can be reduced automatically.

  Furthermore, the nailer 1 can reliably make the protruding portions of the nail even when the density of the base material is different within a certain limit. For this purpose, the hammer is operated in a certain excess energy state that covers the range of changes in substrate hardness. The nailer is designed with this slight excess energy in mind for its stability and robustness. Even if an incorrect setting is selected, the nailer 1 of the present invention will not be permanently damaged.

  The automatic output adjustment mode is particularly advantageous when a driving operation on a similar substrate is performed for a long time. Furthermore, the automatic power adjustment mode ensures that the gas cartridge 8 is used very efficiently. Therefore, a larger number of driving operations are possible per gas cartridge 8.

  When the automatic energy system does not work in the automatic power adjustment mode, for example for highly variable substrates, the automatic power adjustment mode gives the user the option to adjust the tool behavior by the tool energy and the piston advance travel To do.

  The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to limit the invention. For those skilled in the art, modifications of the disclosed embodiments, including the spirit and content of the present invention, can be considered, so that all that fall within the scope of the appended claims and their equivalents are included in the present invention. It must be understood.

DESCRIPTION OF SYMBOLS 1 Hammer 2 Housing 4 Handle 8 Gas cartridge 10 Throttle valve 12 Combustion chamber 14 Cylinder 15 Combustion chamber wall 16 Electric motor 17 Actuation gear mechanism 20 Sensor device 25 Electronic control unit 28 Storage battery 34 Actuation piston 38 Buffer material 42 Trigger 44 Operating device 45 Operating element 50 Sensor device 55 Display device 58 Mode (extruding)
59 mode (sinks)

Claims (10)

A nailer for driving a fastener into a substrate, having an actuating piston (34) that can move rapidly and straight to drive the fastener,
The nailer (1)
Having an operating device (44) capable of switching between manual and automatic output adjustment modes for adjusting the output for adjusting the driving depth ;
A striking machine characterized by that.   The operating device (44) has at least one operating element (45), and the operation or adjustment of the operating element (45) causes the movement of the working piston (34) in the automatic output adjustment mode to 2. The nailer of claim 1, wherein when driving the fastener, the fastener is modified to protrude from the substrate or sink into the substrate at a specified distance. .   The hammer according to claim 2, wherein the distance by which the fastener projects from the base material can be continuously adjusted in the automatic output adjustment mode. The operating device (44) has at least one of the operating elements (45), and the energy supplied to the operating piston (34) when driving the fastener by actuation or adjustment thereof, and / or the 4. The striking machine according to any one of claims 1 to 3 , characterized in that the forward travel of the working piston (34) can be continuously adjusted in the manual output adjustment mode. The said nailer (1) is provided with the display apparatus (55) which shows the output information of the said manual or the said automatic output adjustment mode, The said any one of the Claims 1 thru | or 4 characterized by the above-mentioned. Nailer. A step of switching the manual driving adjustment mode or the automatic output adjustment mode to adjust the output for adjusting the driving depth of the driving device (1) through the operation device;
The operation method of the hammer.   In the automatic power adjustment mode, the movement of the actuating piston can be changed so that the fastener driven by the actuating piston (34) protrudes or sinks into the substrate by a specified distance. The method according to claim 6.   The piston power supplied to the working piston (34) or the forward piston travel of the working piston (34) can be continuously adjusted in the manual output adjustment mode. 8. The method according to 7.   9. A method according to any one of claims 6 to 8, characterized in that in the manual or automatic output adjustment mode, output information is displayed on the nailer (1).   Further comprising determining an approximate target energy for driving the fastener based on actuation or adjustment of the operating device (44), evaluation of previous driving motions, or tool parameters or ambient environment parameters. 10. A method according to any one of claims 6 to 9, characterized in that

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